DRX Scheme for Mobile Terminal Random Access Power Reduction

The patent applies periodic action by implementing Discontinuous Reception (DRX) cycles where the UE alternates between active and sleep states. During random access procedures, the UE wakes up at specific intervals to perform random access and then returns to sleep mode, rather than remaining continuously active. This periodic operation maintains the always-on-line experience while significantly reducing power consumption by keeping the terminal in low-power states during non-critical periods.

The patent extracts the random access procedure from the continuous RRC_Connected handover process by transitioning the UE to RRC_Idle state between handovers. Instead of performing frequent handovers while connected, the UE is moved to idle state where it can perform random access to target cells only when necessary, reducing the frequency of power-consuming handover operations while maintaining mobility management capability.

The patent applies periodic action through DRX cycles that stagger random access attempts across different time intervals. By configuring UEs with different DRX cycle lengths and offsets, simultaneous random access attempts are distributed over time, reducing collisions and decoding errors while maintaining network capacity utilization through continuous access opportunities.

The patent applies dynamics by making the random access procedure conditional and adaptive rather than continuous. The UE dynamically transitions between RRC_Connected and RRC_Idle states based on mobility conditions, performing random access only when transitioning to new cells rather than continuously during high-speed movement. This dynamic approach maintains mobility while reducing power consumption by eliminating redundant access attempts.